Polytene chromosomes normal.
Inversion of sequences from 0 to -5.0 (coordinates according to FBrf0042036). The inversion breakpoints are flanked by P-element insertions that are identical to the P-element present in the progenitor.
Fails to complement Sxl alleles that are defective in somatic function, suggesting that this allele probably eliminates all known somatic functions. Partially complements Sxlf2, an allele defective in germline function; heteroallelic females are semi-fertile and the ovaries do not contain any abnormal oocytes.
Isolated on the basis of its failure to complement Sxlf9.